RelaxChess 3 is built to perform, there were done a lot of changes including architecture redesign with as target to give written in Java game the speed of C++ program. The current version is about 60-70 % faster then the previous release.Other changes include stronger chess engine, key shortcuts to switch the desktops (Linux like), bug fixing.And to show the current speed here a picture of a match between RelaxChess and Kommodo 8 (default settings) where RelaxChess is twice as fast https://youtu.be/B_gmlmqvFW4

4th update, much smaller GUI executable since the AWS SDK software (polly/speech service) not used anymore. Added music game announcements. Engine improvements. RelaxChess processes now up to 1000000 positions per second on 2 core laptop. Scaling supported up to 4 core currently.

RelaxChess has built in online upgrade facility. It means that if You purchase RelaxChess game all later updates or new releases will be for free online automatically installed. Of course only if You give a permission by the online automatic detection of a new update/version. By upgrade/update all your settings , saved or played games stay intact.